CeramicPhase,Period,DateText
1,"Prehistoric","Not closely dated within Period"
2,"Prehistoric","Early-Middle Neolithic"
3,"Prehistoric","Late Neolithic"
4,"Prehistoric","Early Bronze Age"
5,"Prehistoric","Middle Bronze Age"
6,"Prehistoric","Late Bronze Age"
7,"Prehistoric","Early Iron Age"
8,"Prehistoric","Middle Iron Age"
9,"MIA-LIA transition","Date uncertain; could be as late as 50 BC"
10,"Late Iron Age","Not closely dated within Period"
11,"Late Iron Age","Mid first century BC"
12,"Late Iron Age","Late first century BC"
13,"Late Iron Age","Early first century AD"
14,"LIA-Roman transition","Mid first century AD"
15,"Roman","Not closely dated within Period"
16,"Early Roman","Late first century AD"
17,"Early Roman","Early second century AD"
18,"Early Roman","Mid second century AD"
19,"Early-Mid Roman","Late second century AD"
20,"Mid-Roman","Early third century AD"
21,"Mid-Roman","Mid third century AD"
22,"Late Roman","Late third century AD"
23,"Late Roman","Early fourth century AD"
24,"Late Roman","Mid fourth century AD"
25,"Latest Roman","Late fourth to early fifth century AD"
26,"Saxon","Fifth-sixth centuries AD"
27,"Mediaeval",
28,"Post-Mediaeval/Modern",